I hope that this helps someone else. I have seen a lot of posts on LX50 losing power, stalling, not idling.
I finally got my diaphragm to seat properly and tested the function of the slide and it runs much better. This was after multiple carb cleanings, full tune-up, valve adjustment and a new CDI/coil. I was still pulling my hair out, the CDI helped but the trick was how I installed and tested the slide.
I found a video and followed it and it really helped. Iíll try to post the link from YouTube
-Remove the carb
-Drain the bowl and clean the jets with carb cleaner remove and spray the crap out of the idle jet, the long one.
-Remove, Wash and inspect the diaphragm,I used dish soap.
-Put the needle and plastic seat in taking care not to cover the air hole with one of the feet, if you look closely there are 3 spots for the feet. The air hole must be unrestricted.
-pop the assembly up so that it is crowned instead of down, really lock in the seal so that it does not move this will take some work but it will stay in place all around once it locks in and it locks better when it is popped up.
-install the cap and spring.
-blow around the slot on top of the carb intake with compressed air, not too much directly, you will see the slide moving it should go all the way up easily, you can watch it move with the air. If it does not move smoothly and go all the way up start over